Law & Order: Special Victims Unit: Ghost (2005)
(TV Episode)
The show is not mentioned by name, but two women in the pre-credits sequence discuss the episode in which the woman has an affair with her gardener. This was a prominent "DH" storyline at the time.

Date Movie (2006)
A neighbour shouts out that they are trying to watch it at 4 in the morning

The Office: Michael's Birthday (2006)
(TV Episode)
Michael says that he has the same birthday as Eva Longoria so that if he ever meets Teri Hatcher he would have an icebreaker. Desperate Housewives is the series on which Longoria and Hatcher star.